Field experimental study on soil infiltration process of Daxing District,Beijing

The infiltration process and its influencing factors of 3 typical soils in Daxing District,Beijing were studied.Double-ring method was used to measure the soil infiltration curves of 11 sites.At the same time,the infiltration curves were developed with empirical models.The result shows that the infiltration process in the loamy sand reaches stable fastest,and it takes a longer time to reach stable in the sandy loam,and the silty loam reaches stable the slowest;there is a linear correlation between the initial water content and the initial infiltration rate;under the similar soil structure and disturbed condition,the stable infiltration rate of the loamy sand is the biggest,the sandy loam takes the second place,and the stable infiltration rate of the silty loam is the smallest;under the similar soil texture,the stable infiltration rate decreases with the increase of the bulk density;Horton infiltration model can be used in the study area.